JPH0116948Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a plate heat exchanger, and more specifically to a plate heat exchanger that is formed by laminating and fastening a plurality of plate elements suspended from a guide bar. This relates to a reinforcement structure for the plate hanger portion of the exchanger.

Conventional technology A plate heat exchanger is formed by fitting a large number of plate elements into a guide bar made of section steel etc. via a plate hanger, turning every other plate element upside down and stacking them together. It is known to do. However, in known plate heat exchangers, when the plate elements are stacked and fastened, the plate elements are deformed due to insufficient strength of the plate hanger portion, and the heat exchange medium leaks from the inside of the heat exchanger. The risk was recognized. Up until now, methods for preventing heat exchange medium leakage have been adopted, such as spot welding a reinforcing plate to the plate hanger portion or bending the edge of the plate element near the plate hanger portion to increase rigidity. However, in both cases, the molding process of the plate element becomes complicated,
This has been accompanied by disadvantages such as an increase in the manufacturing cost of the heat exchanger.

Problems to be Solved by the Invention In view of the problems of the prior art, the present invention has a heat exchange medium leakage prevention function that improves the strength of the plate hanger portion without special processing on the plate element. The purpose is to provide a good plate heat exchanger.

Another main object of the present invention is to provide a plate heat exchanger that is inexpensive to manufacture and can form a flow path for a heat exchange medium with good sealing performance between the plate elements while using a single plate element. Our goal is to provide the following.

Means for Solving the Problems Therefore, the present invention involves stacking and fastening a plurality of plate elements 1 by turning them upside down every other layer, and forming flow paths for the heat giving medium and the heat receiving medium in every other layer. In a plate type heat exchanger, a convex portion 3 and a concave portion 4 are formed in the plate hanger portions 2, 2' at the upper and lower ends of the plate element 1, respectively, and the above-mentioned Convex part 3
The gist of this is a plate heat exchanger in which the plate hanger portions 2 and 2' are reinforced and the plate hanger portions 2 and 2' are tightly contacted with each other in a facing state.

Embodiment FIG. 1 is a partial plan view illustrating the shape of a convex portion 3 and a concave portion 4 formed in one plate hanger portion 2 of a single plate element 1, and FIG. It is a partial plan view which illustrates the other hanger part 2' of. Furthermore,
FIG. 3 is an overall plan view of the plate element 1, and FIG. 4 is an overall plan view showing the plate element 1 inverted vertically within the same plane.

In these drawings, the plate elements 1 and 1' each having a heat exchange medium flowing groove of substantially the same shape on its surface have a guide made of 1 section steel or the like (not shown) approximately in the center of the upper and lower edges. Plate hanger portions 2, 2' that fit into the bar are formed, and a predetermined number of plates are stacked and fastened with every other plate upside down to form a plate heat exchanger. When the plate elements 1 and 1' are stacked, the convex portion 3 and the concave portion 4 formed on the respective plate hanger portions 2, 2′ are brought into close contact with each other in a facing state, so that the plate hanger portions 2, 2′ are tightened. This improves the bonding strength.

Effects of the invention The plate heat exchanger according to the invention is tightened so that the protrusions 3 and recesses 4 of the hanger parts 2, 2' provided at the upper or lower ends of the plate elements 1, 1' are firmly attached. There is. Therefore, even if there is some distortion or curvature in the plate hanger portions 2, 2' before the plate element is tightened,
After tightening, a strong tightening force acts between adjacent plate elements, correcting the distortion of the plate hanger portion, and fixing the plate elements 1, 1'.
Demonstrates excellent sealing performance against leakage of heat exchange medium from between.

Thus, the present invention can exhibit remarkable effects in improving the durability of the plate heat exchanger and improving the ease of maintenance work by reinforcing the plate hanger portion and improving the sealing performance.

[Brief explanation of drawings]

FIG. 1 is a partial plan view illustrating the shapes of a convex portion 3 and a concave portion 4 formed in a plate hanger portion 2 of a single plate element 1, and FIG. FIG. 3 is a partial plan view illustrating the hanger portion 2' of the element 1'; Furthermore, FIG. 3 is an overall plan view of the plate element 1, and FIG. 4 is an overall plan view showing the plate element 1 upside down within the same plane. 1, 1'...Plate element, 2, 2'...
Plate hanger portion, 3...convex portion, 4...concave portion.

Claims (1)

[Scope of utility model registration request] In a plate heat exchanger in which a plurality of plate elements are stacked and fastened while being turned upside down every other layer, and flow paths for a heat giving medium and a heat receiving medium are formed in every other layer, the plate elements are The plate type is characterized in that a convex part and a concave part are formed in the plate hanger parts at the upper and lower ends, respectively, and the convex part and the concave part are brought into close contact with each other in a facing state between the front and rear plate elements, thereby reinforcing the plate hanger part. Heat exchanger.